(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*

This guide provides a more detailed description of the syntax that is supported along with examples.

This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.

Concept Search - What can I type?

For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.

Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.

Publishing Venue

Related People

Abstract

This article describes an improved method based on the use of superconducting materials for shielding an electron-optical system, such as a scanning electron microscope (SEM), transmission electron microscope (TEM) or electron beam fabrication machine (EBFM) or any other form of electron-optical system from the harmful effects of external magnetic fields, and for the use of such materials to control magnetic fields so as to focus the electrons in such systems.

Country

United States

Language

English (United States)

This text was extracted from an ASCII text file.

This is the abbreviated version, containing approximately
52% of the total text.

Device Based On Superconducting Material for Improving
the Performance
Of Electron-Optical Systems

This article
describes an improved method based on the
use of superconducting materials for shielding an electron-optical
system, such as a scanning electron microscope (SEM), transmission
electron microscope (TEM) or electron beam fabrication machine (EBFM)
or any other form of electron-optical system from the harmful effects
of external magnetic fields, and for the use of such materials to
control magnetic fields so as to focus the electrons in such systems.

In
electron-optical systems, a high spatial resolution is
achieved either by means of a finely focused electron beam (EB), or
by an electron image. This will not work
if the electrons are
deflected through excessive angles by unwanted interfering magnetic
fields. These interfering fields
commonly come from outside the
apparatus and are, therefore, sometimes referred to as "external"
magnetic fields. These fields can be
kept out of the apparatus to
some extent by magnetic shields made from magnetic material.
Alternatively, it is well- known that magnetic shields can be made
from superconducting material cooled to essentially the temperature
of liquid helium.

A second use
of superconducting materials is to control
magnetic fields so as to focus the electrons in such systems.

Recently,
materials such as YBa2Cu3O9-z (also called "high Tc
material") have been discovered that are superconducting at the tem
perature of liquid nitrogen or above.
This invention teaches the use
of such materials in electron-optical systems which are now practical
because it is a much easier proposition to cool system components to
the temperature of liquid nitrogen, rather than to the temperature of
liquid helium.

A simple
experiment to demonstrate the use of these materials
to shield an electron-optical system from the harmful effects of
external magneti...